Completely black screen and no sound?

Question

iMac G5 17" Model A1058

1.6, 1.8, or 2 GHz G5 processor

131 个问题查看全部

jluther @jluther89381

声誉积分: 1

1

发帖于: 2011年5月6日

更多选项

Completely black screen and no sound?

So I have been fighting with this Mac for about 2 weeks now. The symptoms are a completely black screen, as in no video whatsoever (fairly sure it isn't an inverter problem at this point)and also there is no chime sound to indicate the system coming up.

I thought the problem was originally bad caps (3 total replaced), same problem. I opened the power supply and determined there were also bad caps on it, so the power supply was replaced with no help to the problem either. I read that the heatgun reflow trick works for the black screen, tried that and it hasn't helped either! The power button on the Mac lights up but still nothing for sound and display!

The strangest thing about this is that I can hear HDD activity and the first 3 LED's are lit once the machine is powered.

What else can I try to do to fix this problem short of replacing the board? Just for a heads up, I do not have access to an adapter to test against another monitor. I am totally out of ideas at this point.

已回答！ 显示答案我也有这个问题

这是一个好问题吗？

是否

得分 -1

2条评论

Get an adapter, it's cheap compared to a logic board replacement or repair.

由 mayer 完成的 2011年5月6日

If I were to get an adapter and the external display worked what would you suggest?

由 jluther 完成的 2011年5月6日

添加一条评论

2个答案

已选择的解决方案

mayer @mayer

声誉积分: 685.3千

MacHale Enterprises

3.4千

1.1千

2.6千

发帖于: 2011年5月6日

更多选项

If the external monitor works, shine a flashlight at an angle to the screen and see if you can see the desktop. If so, replace the inverter. If not first check all the video cables and connections using a multimeter for continuity and also power. The next thing is the LCD but they seldom go out without warnings.

这个答案有帮助吗？

是否

得分 3

4条评论:

Thank you for the suggestions, I would like to give you an update. I wasn't able to see the screen when shining a flashlight onto the screen. At this point I am thinking that the inverter has gone bad?

由 jluther 完成的 2011年5月10日

If you CAN see the screen, usually it the inverter. Since you can't, it's something else. If you hook up an external monitor, it will narrow down the problem to the LCD.

由 mayer 完成的 2011年5月10日

Would like to add another update. I was a bit hasty in my original diagnosis. After giving the machine enough time to boot up I was able to see faint display with a flashlight. I will swap the inverter to see if that works. Thanks mayer.

由 jluther 完成的 2011年5月11日

Glad you waited, as the inverter is much cheaper than an LCD ;-)

由 mayer 完成的 2011年5月11日

添加一条评论

Get an adapter, it's cheap compared to a logic board replacement or repair. — mayer
If I were to get an adapter and the external display worked what would you suggest? — jluther
Thank you for the suggestions, I would like to give you an update. I wasn't able to see the screen when shining a flashlight onto the screen. At this point I am thinking that the inverter has gone bad? — jluther
If you CAN see the screen, usually it the inverter. Since you can't, it's something else. If you hook up an external monitor, it will narrow down the problem to the LCD. — mayer
Would like to add another update. I was a bit hasty in my original diagnosis. After giving the machine enough time to boot up I was able to see faint display with a flashlight. I will swap the inverter to see if that works. Thanks mayer. — jluther
Glad you waited, as the inverter is much cheaper than an LCD ;-) — mayer

mayflower @mayflower 声誉积分: 1 1 · Answer 1 · 2011-05-11T20:59:43-07:00

mayflower @mayflower

声誉积分: 1

1

发帖于: 2011年5月11日

更多选项

you can restart the phone , if it still not fixed, check the battery, or the problem may lies in the LCD or the ribbon, you can consider replacing the LCD and the screen flex cable ribbon.

这个答案有帮助吗？

是否

得分 0

添加一条评论

iMac G5 17" Model A1058

Completely black screen and no sound?

2个答案

添加你的答案